Hi everyone,

How do I draw ellipse to make an Easter egg to teach kids? I have looked at the libraries and there are only draw rect and circle. Anyone has any suggestions? Would appreciate any help.

Thank you.

Mai

Hi everyone,

How do I draw ellipse to make an Easter egg to teach kids? I have looked at the libraries and there are only draw rect and circle. Anyone has any suggestions? Would appreciate any help.

Thank you.

Mai

codeiscool:

Hi everyone,How do I draw ellipse to make an Easter egg to teach kids? I have looked at the libraries and there are only draw rect and circle. Anyone has any suggestions? Would appreciate any help.

Thank you.

Mai

Here’s the drawEllipse code from my graphics VFD driver:

```
// draw an elipse from centered at X,Y with width and height as specified
void Noritake_VFD_GUU100::drawEllipse (int x, int y, uint8_t width, uint8_t height, uint8_t on)
{
long x1 = -width, y1 = 0; // II quadrant from bottom left to top right
long e2 = height, dx = (1 + 2 * x1) * e2 * e2; // error increment
long dy = x1 * x1, err = dx + dy; // error of 1 step
do {
_setDot (x - x1, y + y1, on); // I Quadrant
_setDot (x + x1, y + y1, on); // II Quadrant
_setDot (x + x1, y - y1, on); // III Quadrant
_setDot (x - x1, y - y1, on); // IV Quadrant
e2 = 2 * err;
if (e2 >= dx) {
x1++;
err += dx += 2 * (long) height * height;
} // x1 step
if (e2 <= dy) {
y1++;
err += dy += 2 * (long) width * width;
} // y1 step
} while (x1 <= 0);
while (y1++ < height) { // too early stop for flat ellipses with width=1
_setDot (x, y + y1, on); // -> finish tip of ellipse
_setDot (x, y - y1, on);
}
}
```